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Income Taxes - Income (Loss) From Continuing Operations Before Taxes (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income Tax Disclosure [Abstract]      
U.S. operations $ 2,502 $ 44,236 $ 37,850
Foreign operations 3,365 5,293 5,502
Income before income taxes $ 5,867 $ 49,529 $ 43,352